Sewing-machine



(No Model.) 3 Sheets-Sheet 1.

J. BOPPEL. SEWING MACHINE.

No. 439,379. Patented Oct. 28, 1890.

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J BOPPEL SEWING MACHINE.

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J BOPPEL SEWING MACHINE.

No. 439,379. Patented Oct. 28. 1890.

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U ITED STATES PATENT OFFICE.

JACOB BQPPEL, NEWARK, NEWV JERSEY.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 439,379, dated October 28, 1890.

Application filed March 31, 1890.

To all whom it may concern.-

Be it known that I, J ACOB BOPPEL, a citizen of the United States, residing at Newark, in the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare the following to be 'a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to certain improvements in that class of sewing-machinesillustrated in my prior patent, No. 396,979, and application, Serial No. 295,537 dated January 5, 1889, the object of the present improvements being to reduce the number of working parts, and thus simplify the construction and reduce the cost of the same, to secure a smoother and more perfectly noiseless movement, to reduce the friction and wear, and to enable the machine to be run at a higher rate of speed.

The invention consists in the improved sewing-machine, and in the arrangements and combinations of parts, substantially as will be hereinafter set forth, and finally embodied in the clauses of the claim.

Referring to the accompanying drawings, embraced in two sheets, in which like letters indicate corresponding parts in each of the several views, Figure 1 is a side elevation of the improved machine. Fig. 2 is a bottom plan showing the arrangement of working parts on the under side of the bedplate. Fig. 3 is a sectional view taken on line in, Fig. 2, in the direction looking toward the feed-bar. Fig. 4 is a section on line y looking in the direction of the bearings for the spool carrier or'shaft, by means of which the spool is raised to or. above the bed-plate; and Fig. 5 isa section on line a in the same direction and showing a certain bracket and throw-off lever and co-operating parts more clearly. Fig. 6 is an enlarged section taken on line .2, looking in the opposite direction, and showing the same parts in connection with the spool-reciprocator and looping-ring. Fig. 7 is a detail plan of the spool-carrier, and Fig. 8 is an elevation of the same.

Serial No. 345,962. (No model.)

111 said drawings, a indicates an ordinary sewing-machine bed-plate, and b the machinearm, having the usual driving-shaft c for working the needle-bar c and needle 0. Upon said driving-shaft is arranged suitable cams d, which engage and operate vertical 1evers or connecting-rods e, f, and g, which extend down from said cams through said arm to a point beneath the bed-plate. Here the said levers engage or are connected to other levers h, h, and j for operating the feedbar It, reciprocating the spool which passes through the looped needle-thread, and vibrating or oscillating the looper Z, respectively.

The feed-bar mechanisms are substantially of the ordinary constructions, and the spoolreciprooator m is substantially of the construction heretofore employed.

The more important improvements herein disclosed are in connection with the looping mechanisms through which the spool is forced in forming the stitch.

The lever g within the machine-arm has a simple vibratory movement on the fulcrum g, Fig. 1. This movement is communicated to the horizontally-disposed lever j, pivoted on a pivoted fulcrum j, Fig. 2, by means of a short connecting-rod 3' At the opposite end from where it receives the said connectin g-rod j the lever j engagesa spirallygrooved sleeve or extensionnof the looper, which said sleeve is arranged on a fixed shaft 0, on the exposed end of which the spool reciprocates or moves back and forth from and to another shaft 27 in longitudinal line therewith under the power of the spool-reciprocating arms m of the lever h.

The sleeve or extension n is rigidly fastened to the looper-disk q, and said disk is connected by'a bar q with a hooked ring (1 of the looper, on which the needle-thread is caught and forced into the form of a loop of suffioient size to allow of the passage therethrough of a full-sized commercial spool of thread.

lVhere the lever j engages the longitudinally-grooved sleeven the same maybeforked, as indicated in outline in Fig. 1, the prongs of the fork being each provided with a pin 4', which extend into the spiral grooves and engage the spirals formed thereby, and as the lever j vibrates the sleeve n is caused to oscil- ICO late and give the desired movement to the looping-ring fixed thereto, and to do so without the noise and jarring or rattle of the means heretofore employed, and when two prongs are employed one may be adjustable, as indicated in Fig. 2. 1

I prefer to have the pins ro move in a straight path or course parallel with the line of the sleeve 02, and to secure such an action the fulcrumj is pivoted to the bed-plate, as at 7' and thelever j is linked to the bed-plate, the linkj being pivotally secured at 9' to a stud 7' of the bed-plate, and riveted or otherwise fastened to the lever by the same pin j" which connects the said lever with the connecting-rod 9' Thus a compound movement is given to the lever by which the desired result is accomplished.

To simplify the construction of the drawoif mechanisms, or the mechanisms by means of which the looped needle-thread is thrown from the face of the looping-ring after the passage of the spool and its thread therethrough, I have provided a bracket 2, which is secured to the bed-plate, as at t, and extends under and around the feed-bar k, and provides a bearing for the throw-01f lever to at a point closely adjacent to the needlethread, where it extends from the looping-ring; to the eye of the needle. At one end the said lever u is slightly bent to engage said thread, and at the other end it is engaged by the lengthened prong m of the forked spool-reciprocator. After the loop has been formed by the looping-ring and the spool has been forced therethrough by the lengthened prong m, the said prong engages the said lever, and the latter engages the needle-thread, forcing it from said looping-ring. When the lengthened prong m becomes disengaged from the throw-off lever, the latter is forced back into a normal position by a spring 12, secured to the bracket, substantially as indicated in Figs. 3, 5, and 6. The said spring is preferably a flat piece of steel secured longitudinally on the edge of the bracket t, where it turns around the edge of the feed-bar k, and is so related to the throw-off lever as that it will cause the latter to turn on its pivotal center a Figs. 5 and 6, in a direction opposite to that toward or in which said lever is forced by the lengthened prong m of the spool-reciprocator. The bearing of the lever u for the spring 11 is of course out of the deadcenter of movement of said lever.

The shaft 10, which receives the spool from the shaft 0, lying in alignment with the latter, has a pivotal relation to the bed-plate and is provided with a spring 19', Figs. 2 and 4, whereby when the slide a of the bed-plate is opened the said shaft p, or spool-carrier, as I have sometimes called it, is caused to spring upward and to carry the spool through the slot in said bed-plate to a point where it may be conveniently grasped by the hand. The said shaft or spool-carrier is of substantially the same construction as heretofore described in Patent No. 396,979, excepting in that I have now provided a finger-piece p by means of which the operator may more conveniently push and hold the spool-carrier down to a point where the slide may be forced into holding engagement with the pin p which holds said shaft or carrierin its proper position of alignment, and to hold said carrier in said position until saidslide is in engagement with said pin, as will be understood.

Having thus described the invention, what I claim as new is- 1. The combination, in a sewing-machine, with abed-plate, of a reciprocating needle and means for operating the same, a spool-spindle fixed to the bed plate, a spirally-grooved sleeve arranged on said spindle, a looper arranged in connection with the said sleeve, a lever j, engaging said sleeve and communicating power thereto, whereby said sleeve is caused to oscillate on its axis, and a connecting-rodj connecting said lever j to the lever g within the machine-arm, said lever g, and means for operating the same, substantially as and for the purposes set forth.

2. The combination, in a sewing-machine,

with a bed-plate, of a reciprocating needle and means for operating the same, a spool-spindle and a spirallygrooved sleeve arranged thereon, means for oscillating said spirallygrooved sleeve, a looping-disk q, rigidly fastened to said sleeve, a connecting-bar q, and a hooked ring (1 all said parts being arranged and adapted to operate substantially as set forth.

3: In a sewing-machine, the combination, with the needle and looping-ring, of a fixed spool-spindle, a spirallygrooved sleeve thereon, a lever j, connecting-rods j and g and means for operating the same, a link f, and a movable fulcrum, all arranged and operating substantially as set forth.

4. In a sewing-machine, the combination, with the needle and looping-ring, of a throw-0E lever fulcru med adjacent to said looping-ring, and a spool-reciprocator having a prolonged fork m engaging said lever, substantially as and for the purposes set forth.

5. In combination with the spool spindle or shaft 0, the looper and spool-reciprocator, a pivoted spool-carrier 19, having apin p and a finger-piece 11 independent of said pin, substantially as set forth.

6. In a sewing-machine, the combination, with a spool-spindle and a looper, of a spirallygrooved sleeve fixed to said looper and oscillating on said spindle, and a horizontal forked lever provided with pins which enter the grooves of said sleeve, and means for oscillating said lever, substantially as set forth.

7. In a sewing-machine, the combination of a looper and means for operating the same, a spool-reciprocator having an elongated prong m and means for operating the same, a throw-off lever arranged upon a suitable fixture adjacent to said looper and elongated prong and adapted to be engaged by the latto press the saidlever back into normal position, substantially as set forth.

In testimony that I claim the. foregoing I have hereunto set my hand this 22d day of March, 1890.

JACOB BOPPEL.

Witnesses:

CHARLES H. PELL, OSCAR A.-MICHEL. 

